UPDATE 8/9/17: Four hours after my review went up, the developer added six balanced maps to the game for hotseat play and more "fair" contests against the AI. This changes my overall review to a "positive" one. The original review text follows:

Similar in approach to Advance Wars, the game features twelve maps of varied sizes, all of which provide significant resource advantages to the blue player (the AI by default, but it can be switched). This eliminates any balance for hot seat games, and the lack of a map editor (no random maps, either) means no alterations can be made to make things more fair. Locations around each map can be captured to provide resources (towns) or produce units (one land, air, or sea unit per location each turn). Units can move and attack each turn, and certain units perform better against specific enemies. The AI is a capable opponent, capturing locations and engaging with appropriate units, which makes any resource advantage seem unnecessary. While Casus Belli: Battle Of Annihilation offers approachable, simplified turn-based gameplay, the map design and lack of other features hold the game back.

https://www.youtube.com/watch?v=6IDf66R4eiY

interesting and addictive turn based strategy made in simple visual minecraft style
conquer cities to earn more gold to be able to have enough money to produce more military equipments,
make wise moves, count enemies powers - game's not at all easy to play.
vast number of setup options - map size, balance, etc.
i enjoyed it.

An intresting little game but it gets old after ten min. Honestly, there are better tbs games out there.